1930年海底線通信協定の改定をめぐる攻防 : 南京国民政府対大北電信会社の交渉を中心に1930年海底線通信協定の改定をめぐる攻防 : 南京国民政府対大北電信会社の交渉を中心にAA12055548The Battle over the Revision of the Agreement with Foreign Cable Companies in 1930 : With a Focus on the Negotiations between the Nationalist Government and the Great Northern Telegraph Company